Neco Model Questions Vol1 2025 Agricultural Science Question 7

Practice essay / theory question 7 from the 2025 Neco Model Questions Vol1 Agricultural Science examination. This question covers Crop Pests .

Neco Model Questions Vol1 2025 Agricultural Science Essay / Theory
Topic: Crop Pests
Question 7 NECO_MODEL_QUESTIONS_VOL1 • 2025 • AGRICULTURAL_SCIENCE • essay

A farmer cultivates 2.5 hectares of maize. Recent field scouting shows leaf rolling and yellowing of the leaves. Laboratory analysis identifies the pest as the African maize stalk borer (Busseola fusca).

Question Parts

( a )
Describe the life cycle of Busseola fusca and indicate which stage causes the greatest damage to the crop.
( b )
The recommended insecticide dosage is 0.75 L per hectare at a concentration of 200 g active ingredient (a.i.) per litre. Calculate the total volume of insecticide required for the whole field and the total amount of active ingredient needed.
( c )
Discuss at least three cultural or biological control methods that could be incorporated into an Integrated Pest Management (IPM) programme for Busseola fusca, and explain how each method reduces reliance on chemical insecticides.
( d )
The economic injury level (EIL) for Busseola fusca is a 5 % yield loss. Each hectare normally yields 6 tonnes of maize valued at ₦30 000 per tonne. Estimate the monetary loss if the pest reaches the EIL, and comment on whether the cost of applying the insecticide (₦12 000 per hectare) is justified.

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About This Question

This is Neco Model Questions Vol1 2025 Agricultural Science Question 7. It is one of the essay questions from the 2025 Neco Model Questions Vol1 Agricultural Science examination.

The question covers Crop Pests .

View More Neco Model Questions Vol1 2025 Agricultural Science Questions More Neco Model Questions Vol1 Practice Questions Back to Questions

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